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SBF motor, 9.5to1, healthy breathing. I'm switching to NGK after using Autolites for a long time. What's a good plug heat range and gap for the street??:confused:
 

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Depends on ignition and boost
 

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what head? N/A? What fuel? Cranking compression? This list could go on a while and for starters i dont even know if u need a gasket or taper seat due to the lack of info given.
 
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